» (6)- (:) + (2) ---» :) - (3) n n +(-1)" (" ). = 0. с) + 3 n +...+n = n2"-1.

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter1: Fundamental Concepts Of Algebra
Section1.4: Fractional Expressions
Problem 65E
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For n>=1, derive each identities below: 

» (;) - (:) + (2)-- +-»r (:) -
(1) +2(:) +*(;)
n
n
(b)
n
+(-1)"
= 0.
n
(c)
n
n
+...+n
3
n
= n2"-1.
п
Transcribed Image Text:» (;) - (:) + (2)-- +-»r (:) - (1) +2(:) +*(;) n n (b) n +(-1)" = 0. n (c) n n +...+n 3 n = n2"-1. п
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